openpgp: Improve performance of test.

1 files changed, 6 insertions, 4 deletions

diff --git a/openpgp/src/parse/stream.rs b/openpgp/src/parse/stream.rs
index 79b4c7e8..7ed6badc 100644
--- a/openpgp/src/parse/stream.rs
+++ b/openpgp/src/parse/stream.rs
@@ -2078,6 +2078,9 @@ mod test {
     // This test is relatively long running in debug mode.  Split it
     // up.
     fn detached_verifier_read_size(l: usize) {
+        lazy_static! {
+            static ref ZEROS: Vec<u8> = vec![0; 100 * 1024 * 1024];
+        }
         struct Test<'a> {
             sig: &'a [u8],
             content: &'a [u8],
@@ -2093,7 +2096,7 @@ mod test {
             Test {
                 sig: crate::tests::message(
                     "emmelie-dorothea-dina-samantha-awina-detached-signature-of-100MB-of-zeros.sig"),
-                content: &vec![ 0; 100 * 1024 * 1024 ][..],
+                content: &ZEROS[..],
                 reference:
                 crate::types::Timestamp::try_from(1572602018).unwrap().into(),
             },
@@ -2105,9 +2108,6 @@ mod test {
             .map(|f| Cert::from_bytes(crate::tests::key(f)).unwrap())
             .collect::<Vec<_>>();
 
-        let mut buffer = Vec::with_capacity(104 * 1024 * 1024);
-        buffer.resize(buffer.capacity(), 0);
-
         let read_to_end = |v: &mut Verifier<_>, l, buffer: &mut Vec<_>| {
             let mut offset = 0;
             loop {
@@ -2130,6 +2130,7 @@ mod test {
             offset
         };
 
+        let mut buffer = vec![0; 104 * 1024 * 1024];
         for test in tests.iter() {
             let sig = test.sig;
             let content = test.content;
@@ -2162,6 +2163,7 @@ mod test {
             assert_eq!(got.len(), content.len());
             assert_eq!(got, &content[..]);
         }
+        crate::vec_truncate(&mut buffer, 0);
     }
 
     #[test]